git-check-mailmap - Man Page

Show canonical names and email addresses of contacts

Examples (TL;DR)

Synopsis

git check-mailmap [<options>] <contact>​...

Description

For each “Name <user@host>”, “<user@host>”, or “user@host” from the command-line or standard input (when using --stdin), look up the person’s canonical name and email address (see "Mapping Authors" below)​. If found, print them; otherwise print the input as-is​.

Options

--stdin

Read contacts, one per line, from the standard input after exhausting contacts provided on the command-line​.

--mailmap-file=<file>

In addition to any configured mailmap files, read the specified mailmap file​. Entries in this file take precedence over entries in either the default mailmap file or any configured mailmap file​.

--mailmap-blob=<blob>

Like --mailmap-file, but consider the value as a reference to a blob in the repository​. If both --mailmap-file and --mailmap-blob are specified, entries in --mailmap-file will take precedence​.

Output

For each contact, a single line is output, terminated by a newline​. If the name is provided or known to the mailmap, “Name <user@host>” is printed; otherwise only “<user@host>” is printed​.

Configuration

See mailmap​.file and mailmap​.blob in git-config(1) for how to specify a custom ​.mailmap target file or object​.

Mapping Authors

See gitmailmap(5)​.

Git

Part of the git(1) suite

Info

09/28/2026 Git 2.56.0 Git Manual